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Example: dST for hysteresis function
Condition
Reaction
1 Volumetric flow quantity Q reaches LFC dST starts, output becomes active
2 dST elapsed, Q reached SP
Output remains active
3 Q below SP but above rP
Output remains active
4 Q below rP
Output is reset
5 Q reaches again LFC
dST starts, output becomes active
6 dST elapsed, Q has not reached SP
Output is reset
7 Q reaches SP
Output becomes active
